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Journal articleMüller C, Ferenczi TAM, Campoy-Quiles M, et al., 2008,
Binary organic photovoltaic blends: a simple rationale for optimum compositions
, Advanced Materials, Vol: 20, Pages: 3510-3515 -
Journal articleKwiatkowski JJ, Nelson J, Li H, et al., 2008,
Simulating charge transport in tris(8-hydroxyquinoline) aluminium (Alq3)
, PHYSICAL CHEMISTRY CHEMICAL PHYSICS, Vol: 10, Pages: 1852-1858, ISSN: 1463-9076- Author Web Link
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- Citations: 172
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Conference paperCampoy-Quiles M, Nelson J, Etchegoin PG, et al., 2008,
On the determination of anisotropy in polymer thin films:: A comparative study of optical techniques
, 4th International Conference on Spectroscopic Ellipsometry (ICSE-4), Publisher: WILEY-V C H VERLAG GMBH, Pages: 1270-+, ISSN: 1862-6351- Author Web Link
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- Citations: 21
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Journal articleKwiatkowski JJ, Frost JM, Kirkpatrick J, et al., 2008,
Zero-point fluctuations in naphthalene and their effect on charge transport parameters
, The Journal of Physical Chemistry A, Vol: 112, Pages: 9113-9117 -
Journal articleBallantyne AM, Chen L, Nelson J, et al., 2007,
Studies of highly regioregular poly(3-hexylselenophene) for photovoltaic applications
, ADVANCED MATERIALS, Vol: 19, Pages: 4544-+, ISSN: 0935-9648- Author Web Link
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- Citations: 141
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Journal articleCampoy-Quiles M, Nelson J, Bradley DDC, et al., 2007,
Dimensionality of electronic excitations in organic semiconductors: A dielectric function approach
, PHYSICAL REVIEW B, Vol: 76, ISSN: 2469-9950- Author Web Link
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- Citations: 36
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Conference paperBlakesley JC, Keivanidis PE, Campoy-Quiles M, et al., 2007,
Organic semiconductor devices for X-ray imaging
, 10th International Symposium on Radiation Physics, Publisher: ELSEVIER, Pages: 774-777, ISSN: 0168-9002- Author Web Link
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- Citations: 17
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Journal articleWalker AB, Beljonne D, Athanasopoulos S, et al., 2007,
Exciton and charge migration in rigid rod conjugated polymers
, ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, Vol: 234, ISSN: 0065-7727 -
Journal articleKim Y, Cook S, Kirkpatrick J, et al., 2007,
Effect of the end group of regioregular poly(3-hexylthiophene) polymers on the performance of polymer/fullerene solar cells
, JOURNAL OF PHYSICAL CHEMISTRY C, Vol: 111, Pages: 8137-8141, ISSN: 1932-7447- Author Web Link
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- Citations: 87
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Journal articleKirkpatrick J, Marcon V, Nelson J, et al., 2007,
Charge mobility of discotic mesophases: A multiscale quantum and classical study
, PHYSICAL REVIEW LETTERS, Vol: 98, ISSN: 0031-9007- Author Web Link
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- Citations: 168
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Journal articleKirkpatrick J, Marcon V, Nelson J, et al., 2007,
Charge Mobility of Discotic Mesophases: A Multiscale Quantum and Classical Study
, PHYS REV LETT 98(22): 227402, Vol: 98, Pages: 227402-1-227402-4, ISSN: 0031-9007 -
Journal articleBenson-Smith JJ, Goris L, Vandewal K, et al., 2007,
Formation of a ground-state charge-transfer complex in polyfluorene/[6,6]-phenyl-C<sub>61</sub> butyric acid methyl ester (PCBM) blend films and its role in the function of polymer/PCBM solar cells
, ADVANCED FUNCTIONAL MATERIALS, Vol: 17, Pages: 451-457, ISSN: 1616-301X- Author Web Link
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- Citations: 234
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Journal articleChandler RE, Houtepen AJ, Nelson J, et al., 2007,
Electron transport in quantum dot solids: Monte Carlo simulations of the effects of shell filling, Coulomb repulsions, and site disorder
, PHYSICAL REVIEW B, Vol: 75, ISSN: 2469-9950- Author Web Link
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- Citations: 72
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Journal articleKim Y, Nelson J, Durrant JR, et al., 2007,
Polymer chain/nanocrystal ordering in thin films of regioregular poly(3-hexylthiophene) and blends with a soluble fullerene
, SOFT MATTER, Vol: 3, Pages: 117-121, ISSN: 1744-683X- Author Web Link
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- Citations: 44
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Journal articleSims M, Tuladhar S, Nelson J, et al., 2007,
Correlation between microstructure and charge transport in poly(2,5-dimethoxy-p-phenylenevinylene) thin films
, Vol: 76, ISSN: 1098-0121 -
Journal articleBoucle J, Ravirajan P, Nelson J, 2007,
Hybrid polymer-metal oxide thin films for photovoltaic applications
, JOURNAL OF MATERIALS CHEMISTRY, Vol: 17, Pages: 3141-3153, ISSN: 0959-9428- Author Web Link
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- Citations: 296
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Journal articleAthanasopoulos S, Kirkpatrick J, Martínez D, et al., 2007,
Predictive study of charge transport in disordered semiconducting polymers
, Nano letters, Vol: 7, Pages: 1785-1788 -
Journal articleKawano K, Pacios R, Poplavskyy D, et al., 2006,
Degradation of organic solar cells due to air exposure
, SOLAR ENERGY MATERIALS AND SOLAR CELLS, Vol: 90, Pages: 3520-3530, ISSN: 0927-0248- Author Web Link
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- Citations: 615
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Journal articlePeiro AM, Colombo C, Doyle G, et al., 2006,
Photochemical reduction of oxygen adsorbed to nanocrystalline TiO<sub>2</sub> films:: A transient absorption and oxygen scavenging study of different TiO<sub>2</sub> preparations
, JOURNAL OF PHYSICAL CHEMISTRY B, Vol: 110, Pages: 23255-23263, ISSN: 1520-6106- Author Web Link
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- Citations: 104
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Journal articlePacios R, Chatten AJ, Kawano K, et al., 2006,
Effects of photo-oxidation on the performance of poly[2-methoxy-5-(3′,7′-dimethyloctyloxy)-1,4-phenylene vinylene]:[6,6]-phenyl C<sub>61</sub>-butyric acid methyl ester solar cells
, ADVANCED FUNCTIONAL MATERIALS, Vol: 16, Pages: 2117-2126, ISSN: 1616-301X- Author Web Link
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- Citations: 97
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Journal articleCook S, Ohkita H, Durrant JR, et al., 2006,
Singlet exciton transfer and fullerene triplet formation in polymer-fullerene blend films
, APPLIED PHYSICS LETTERS, Vol: 89, ISSN: 0003-6951- Author Web Link
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- Citations: 67
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Journal articleOlson CL, Nelson J, Islam MS, 2006,
Defect chemistry, surface structures, and lithium insertion in anatase TiO<sub>2</sub>
, JOURNAL OF PHYSICAL CHEMISTRY B, Vol: 110, Pages: 9995-10001, ISSN: 1520-6106- Author Web Link
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- Citations: 164
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Journal articleRavirajan P, Peiró AM, Nazeeruddin MK, et al., 2006,
Hybrid polymer/zinc oxide photovoltaic devices with vertically oriented ZnO nanorods and an amphiphilic molecular interface layer
, JOURNAL OF PHYSICAL CHEMISTRY B, Vol: 110, Pages: 7635-7639, ISSN: 1520-6106- Author Web Link
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- Citations: 493
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Journal articleKim Y, Cook S, Tuladhar SM, et al., 2006,
A strong regioregularity effect in self-organizing conjugated polymer films and high-efficiency polythiophene: fullerene solar cells
, NATURE MATERIALS, Vol: 5, Pages: 197-203, ISSN: 1476-1122- Author Web Link
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- Citations: 2167
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Journal articleKhodabakhsh S, Sanderson BM, Nelson J, et al., 2006,
Using self-assembling dipole molecules to improve charge collection in molecular solar cells
, ADVANCED FUNCTIONAL MATERIALS, Vol: 16, Pages: 95-100, ISSN: 1616-301X- Author Web Link
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- Citations: 229
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Journal articlePeiro AM, Ravirajan P, Govender K, et al., 2006,
Hybrid polymer/metal oxide solar cells based on ZnO columnar structures
, JOURNAL OF MATERIALS CHEMISTRY, Vol: 16, Pages: 2088-2096, ISSN: 0959-9428- Author Web Link
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- Citations: 239
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Journal articleFrost JM, Cheynis F, Tuladhar SM, et al., 2006,
Influence of polymer-blend morphology on charge transport and photocurrent generation in donor-acceptor polymer blends
, Nano letters, Vol: 6, Pages: 1674-1681 -
Conference paperBallantyne AM, Wilson JS, Nelson J, et al., 2006,
TOF mobility measurements in pristine films of P3HT: control of hole injection and influence of film thickness
, Conference on Organic Photovoltaics VII, Publisher: SPIE-INT SOC OPTICAL ENGINEERING, ISSN: 0277-786X- Author Web Link
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- Citations: 5
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Journal articleKreouzis T, Poplavskyy D, Tuladhar SM, et al., 2006,
Temperature and field dependence of hole mobility in poly(9,9-dioctylfluorene)
, Phys Rev B 73, Vol: 73, Pages: 235201-1-235201-15, ISSN: 1098-0121 -
Journal articlePeiró AM, Ravirajan P, Govender K, et al., 2005,
The effect of zinc oxide nanostructure on the performance of hybrid polymer/zinc oxide solar cells
, Proceedings of SPIE - The International Society for Optical Engineering, Vol: 5938, Pages: 1-8, ISSN: 0277-786XSolar cells fabricated from composites of conjugated polymers with nanostructured metal oxides are gaining interest on account of the stability, low cost and electron transport properties of metal oxides. Zinc oxide (ZnO)/polymer solar cells are promising compared to other metal oxide/polymer combinations, on account of the possibility of low temperature synthesis, as well as the potential for controlling interface morphology through simple processing from solution. Here, we focus on the effect of surface morphology of ZnO films on photovoltaic device performance. We have successfully grown ZnO nanorods standing almost perpendicular to the electrodes on a flat, dense ZnO "backing" layer. We studied structures consisting of a conjugated polymer in contact with three different types of ZnO layer: a flat ZnO backing layer alone; ZnO nanorods on a ZnO backing layer; and ZnO nanoparticles on a ZnO backing layer. We use scanning electron microscopy, steady state and transient absorption spectroscopies and photovoltaic device measurements to study the morphology, charge separation and recombination behaviour and device performance of the three types of structures. We find that charge recombination in the structures containing vertically aligned ZnO nanorods is remarkably slow, with a half life of over 1 ms, over two orders of magnitude slower than for randomly oriented ZnO nanoparticles. A photovoltaic device based on the nanorod structure which has been treated with an ambiphilic dye before deposition of poly(3-hexyl thiophene) (P3HT) polymer shows a power conversion efficiency over four times greater than for a similar device based on the nanoparticle structure. The best ZnO nanorods: P3HT device yields a short circuit current density of 2 mAcm -2 under AM 1.5 illumination (100mWem-2) and peak external quantum efficiency over 14%, resulting in a power conversion efficiency of 0.20%.
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